Related Questions

Which of the following is the most likely source of harmonics in a transformer?
A Poor insulation
B Overload
C Loose connections
D Core saturation
The main reason for generation of harmonics in a transformer could be
A fluctuating load
B poor insulation
C mechanical vibrations
D saturation of core
Vibration of which among the following produces only odd harmonics?
A A vibrating rod fixed at two ends
B A vibrating string fixed at two ends
C An air column in a closed organ pipe
D An air column in an open organ pipe
Think a number and then double the number. Then add 8 and multiply the result by 6. Now divide the result by 10 the subtract the number you first thought out. what is the final result?
A 4
B 6
C 10
D 14
Think a number and then double the number. Then add 8 and multiply the result by 6. Now divide the result by 12, then subtract the number you first thought out. What u the final result?
A 4
B 6
C 10
D 14
Subtract 3 from the number n. multiply the result by 3. Add 3 and then divide this result by 3. what is the final result ?
A n
B n-1
C n-2
D n-3
Think of a number and then double the number Add 6 and multiply the result by 10. Now divide the result by 20 , then subtract the number you first thought out. What is the result?
A 2
B 3
C 4
D 5
Which of the following is the main advantage of an auto-transformer over a two-winding transformer?
A Eddy losses are totally eliminated
B Copper losses are negligible
C Saving in winding material
D Hysteresis losses are reduced
The output transformer used in a power amplifier is a ___________ transformer
A 1:1 ratio
B Step-up
C Step-down
D None of the above
The changes in volume of transformer cooling oil due to variation of atmospheric tem-perature during day and night is taken care of by which part of transformer
A Conservator
B Breather
C Bushings
D Buchholz relay

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